A second-chance Brooklyn high school in one of the city’s poorest neighborhoods has posted Regents results that are so good, they’re jaw-dropping.

Passing rates on the Regents exams at Brownsville Academy HS have surged so much in recent years that the high-needs transfer school bested Midwood’s venerable Edward Murrow HS in four out of five Regents exams in 2012.

Despite serving older kids who fall behind academically and transfer from other high schools, Brownsville had passing rates of 93 percent on the US History exam last year and 91 percent on Integrated Algebra.

The citywide average for passing the Integrated Algebra exam was 60.5 percent last year.

Since NYC Leadership Academy graduate LaShawn Robinson became principal in 2008, Brownsville’s success rates on the challenging Global History Regents have more than doubled — going from 36 percent to 74 percent.

Likewise, its English scores have more than doubled, from 37 percent in 2008 to 89 percent last year — results that have even surprised students.

“I thought I would do bad [in English], because I don’t know certain words,” said Tathianna Farrell, a senior who scored a 79 out of 100 on her English Regents.

She attributed her grade to full-day Saturday prep classes.

Junior Nikoakh Yisrael said smaller class sizes and teachers who don’t move to the next topic until everyone understands were the driving force behind the school’s success.

Still, she said her 92 on the English was better than expected.

“I wasn’t sure I was going to do well on English, but I did,” she said.

A former teacher said administrators had put pressure on teachers to boost graduation rates by ensuring that more students passed their Regents — which schools graded themselves until this year.

“They’re not going to say you have to do this and spell it out. They’re too smart for that,” he said. “Each department had to figure out how to get their students to increase their performance on the Regents. Basically, you knew there was a lot of pressure to get their scores up.”

Robinson, who earned bonuses totaling $19,000 for her school’s performance in 2011 and 2012, did not respond to a request for comment. Several teachers also declined to comment.

Asked about the school, city Department of Education officials said no one had raised any questions about the scores. They did not say whether the school had served as a model for other second-chance schools to follow.

But a high-school principal who was asked to review the school’s scores said they were certainly worthy of either celebration or scrutiny.

“If you can have 89 percent of your kids pass the English and 91 percent of your kids pass the math, I would say what are your kids doing in a transfer school?” the principal said.